How to process multiple files with pandoc?

files:

$ ls
a.md
b.md
c.md
d.md
e.md

Command: pandoc file.md -f markdown file.pdf How would I parallely process two pandoc instances simulatneously? Possibly with xargs or parallel. It would work like Iteration/ cmd 1 / cmd 2 1 / pandoc a.md -f markdown a.pdf / pandoc b.md -f markdown b.pdf 2 / pandoc c.md -f markdown c.pdf / pandoc d.md -f markdown d.pdf 3 / pandoc e.md -f markdown e.pdf / pandoc f.md -f markdown f.pdf 4 / pandoc g.md -f markdown g.pdf / pandoc h.md -f markdown h.pdf The files are randomly named.